Auxetic Metal Plate Support for Rollable Display Rigidity
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Solution Overview
Problem
Existing flexible display devices face challenges in maintaining both flexibility and structural integrity, particularly in rollable or bendable configurations, leading to potential damage and deterioration of the display panel under external stress.
Innovation Solution
A display device design incorporating a metal plate with an auxetic structure and a support plate, along with carbon fiber or glass fiber reinforced plastic support bars, allows for flexibility and rigidity, enhancing impact resistance and maintaining surface quality during rolling or bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device uses a flexible structure to enable rolling, then flexibility is improved, but impact resistance deteriorates
Solution Approach 1:
The patent employs a composite structure consisting of a flexible display module combined with a rigid support plate and metal plate. This composite construction allows the display to maintain flexibility for rolling while the rigid support structures provide impact resistance and structural integrity when the display is deployed or stored.
Solution Approach 2:
The support structure is divided into multiple components: a support plate with base part and support bars, and a separate metal plate with auxetic structure. This segmentation allows each component to perform its specific function - the support plate provides structural framework while the metal plate enhances rigidity and impact resistance.
2Strength
If the display device uses a rigid structure to improve impact resistance, then strength is improved, but flexibility deteriorates
Solution Approach 1:
The rigid support structures (support plate and metal plate) are strategically positioned only where needed - beneath the flexible display module - to provide impact resistance without constraining the display's ability to roll. The auxetic structure in the metal plate specifically provides rigidity in the planar direction while allowing bending along the rolling axis.
3Strength
If the display device uses a thick support plate to improve rigidity, then strength is improved, but device complexity increases
Solution Approach 1:
The support structure is segmented into a support plate with integrated base part and support bars, eliminating the need for additional reinforcing components. This segmentation allows the structure to achieve high rigidity through its geometric configuration rather than increasing overall thickness or adding complex bracing elements.
4Manufacturing precision
If the display device uses a patterned metal plate with auxetic structure to maintain surface quality when rolled, then surface finish is improved, but manufacturing precision requirements increase
Solution Approach 1:
The metal plate incorporates an auxetic structure with specific geometric parameters (negative Poisson's ratio) that fundamentally changes its mechanical behavior. This parameter change allows the plate to maintain surface quality during rolling through its inherent structural properties rather than requiring precision control of rolling forces or temperatures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design secures flexibility and rigidity simultaneously, protecting the display panel from external shocks and maintaining surface quality, even with repeated rolling or bending.
Implementation Method 1
The metal plate may include an auxetic structure having a negative Poisson's ratio
Data Source
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AI summary
A display device includes a display module having flexibility, a metal plate under the display module and patterned, and a support plate under the metal plate and including a base part, and support bars surrounded by the base part and extending in a direction parallel to the display module.